content: /*
   * Protocol Buffers - Google's data interchange format
   * Copyright 2014 Google Inc.  All rights reserved.
   * https://developers.google.com/protocol-buffers/
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are
   * met:
   *
   *     * Redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above
   * copyright notice, this list of conditions and the following disclaimer
   * in the documentation and/or other materials provided with the
   * distribution.
   *     * Neither the name of Google Inc. nor the names of its
   * contributors may be used to endorse or promote products derived from
   * this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  package com.google.protobuf.jruby;
  
  import com.google.protobuf.Descriptors;
  import org.jruby.RubyModule;
  import org.jruby.RubyNumeric;
  import org.jruby.anno.JRubyMethod;
  import org.jruby.runtime.ThreadContext;
  import org.jruby.runtime.builtin.IRubyObject;
  
  public class RubyEnum {
      /*
       * call-seq:
       *     Enum.lookup(number) => name
       *
       * This module method, provided on each generated enum module, looks up an enum
       * value by number and returns its name as a Ruby symbol, or nil if not found.
       */
      @JRubyMethod(meta = true)
      public static IRubyObject lookup(ThreadContext context, IRubyObject recv, IRubyObject number) {
          RubyEnumDescriptor rubyEnumDescriptorescriptor = (RubyEnumDescriptor) getDescriptor(context, recv);
          Descriptors.EnumDescriptor descriptor = rubyEnumDescriptorescriptor.getDescriptor();
          Descriptors.EnumValueDescriptor value = descriptor.findValueByNumber(RubyNumeric.num2int(number));
          if (value == null) return context.runtime.getNil();
          return context.runtime.newSymbol(value.getName());
      }
  
      /*
       * call-seq:
       *     Enum.resolve(name) => number
       *
       * This module method, provided on each generated enum module, looks up an enum
       * value by name (as a Ruby symbol) and returns its name, or nil if not found.
       */
      @JRubyMethod(meta = true)
      public static IRubyObject resolve(ThreadContext context, IRubyObject recv, IRubyObject name) {
          RubyEnumDescriptor rubyEnumDescriptorescriptor = (RubyEnumDescriptor) getDescriptor(context, recv);
          Descriptors.EnumDescriptor descriptor = rubyEnumDescriptorescriptor.getDescriptor();
          Descriptors.EnumValueDescriptor value = descriptor.findValueByName(name.asJavaString());
          if (value == null) return context.runtime.getNil();
          return context.runtime.newFixnum(value.getNumber());
      }
  
      /*
       * call-seq:
       *     Enum.descriptor
       *
       * This module method, provided on each generated enum module, returns the
       * EnumDescriptor corresponding to this enum type.
       */
      @JRubyMethod(meta = true, name = "descriptor")
      public static IRubyObject getDescriptor(ThreadContext context, IRubyObject recv) {
          return ((RubyModule) recv).getInstanceVariable(Utils.DESCRIPTOR_INSTANCE_VAR);
      }
  }
  